/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraParameterMapHistory.h
Trace back a pin to whom it was connected to to find the current parameter map to use.
int32 TraceParameterMapOutputPin ( const [FOutputPin](API\Plugins\NiagaraEditor\TNiagaraParameterMapHistoryBuild-\FOutputPin) * OutputPin )